Egan, G. (1975). The skilled helper: A model for systematic helping and interpersonal relating. Brooks / Cole.
Citazione stile Chigago Style (17a edizione)Egan, Gerard. The Skilled Helper: A Model for Systematic Helping and Interpersonal Relating. California: Brooks / Cole, 1975.
Citatione MLA (9a ed.)Egan, Gerard. The Skilled Helper: A Model for Systematic Helping and Interpersonal Relating. Brooks / Cole, 1975.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.